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Mnenie [13.5K]
3 years ago
11

Find the length of BC

Mathematics
1 answer:
sdas [7]3 years ago
8 0

Answer:

It would be 90

Step-by-step explanation:

If you look at it you can see it is a right angle. And a right angle is always 90 degrees. Hopes this helps and have a nice day and stay safe

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Are the two parabolas defined below similar or congruent or both? Justify your reasoning. Parabola 1: The parabola with a focus
Dominik [7]

Answer:

They are similar by a factor of 14

Step-by-step explanation:

From the general equation of a parabola opening up (since the directrix is on the y axis and the focus is upwards this line) the focus coordinates are:

Focus = (h,k+p) = (0,2)

So h=0 and k+p=2, for the directrix:

y = k-p=-4

solving k and p from the two equations above:

k=-1 and p=3

So for Parabola 1 the equation would be:

x^{2} =4*3(y+1)

For Parabola 2 the general equation is:

x^{2} =4*(3/2)(y)

here h=0, k=0, p=3/2 so focus is (0,3/2), directix is y=-3/2, they have the same orientation.

they are not congruent. For them to be similar it must comply:

x_{1}=k x_{2}\\y_{1}=ky_{2} => (1/12)x_{1} ^{2} -1 = k(1/6)x_{2} ^{2}

replacing x_{1} and solving for k:

(1/12)(kx_{2}) ^{2} -1 = k(1/6)x_{2} ^{2}\\ (1/12)k^{2} x_{2}^{2}-1 = k(1/6)x_{2} ^{2}\\k-12 = (12/6)=2\\k = 2+12=14\\

They are similar by a factor of 14

8 0
3 years ago
A student bikes 1/4 mile to school. After school, the student bikes 1/3 mile to a cousin’s house. Finally, the student bikes 7/1
gizmo_the_mogwai [7]

The miles the student biked in two weeks is 11 2/3 miles.

The distance the student bikes is given in fractions. Fractions are numbers that are made up of numerator and denominators. An examples of a fraction is 1/4. 1 is the numerator and 4 is the denominator.

In order to determine the distance biked in 2 weeks, the distance biked in a day has to be determined.

Distance biked in a day =  (1/4 + 1/3 + 7/12)

14/12 = 1 2/12 = 1 1/6

Distance he would travel in 2 weeks

1 1/6 x 10

7/6 x 10 = 70 /6 = 11 2/3 miles

To learn more about fractions, please check: brainly.com/question/848992

5 0
3 years ago
Eliminate the parameter. x = square root of t, y = 4t + 1
tresset_1 [31]
\sqrt{t}, y=4t+1


change x=\sqrt{t} into x^{2} =t to get rid of the square root. Keep in mind that if you need to graph the equation, x>=0 because there can't be a negative under the square root.

Then substitute x^{2} into y=4t+1 for t and you get:
y=4 x^{2} +1
4 0
3 years ago
Read 2 more answers
Question 2 (1 point)
hichkok12 [17]

Answer:

Rebecca does not have a return yet because the stock was not sold since there was a limit order at $33.

However, the value of her investment can be put around $2,400 (100 x $24 average price).

Step-by-step explanation:

Price of Havad Stock bought a year ago = $20

No. of shares = 100

Limit order selling price = $33

Stock prices during the limit order day = $23, $26, and $22

The stock cannot be sold, since its price did not reach $33.

Rebecca's limit order is an order to buy or sell her stock in Havad at $33 or better. Since her order is a sell limit order, it can only be executed at the limit price of $33 or higher.  Unfortunately, the price of the stock did not reach the limit order on that particular day.  This implies that her limit order is not guaranteed to execute.

8 0
3 years ago
Callie solved this one-variable equation. When she was done, she tried to verify her answer, but found that it was wrong. Can yo
Andrews [41]
2(4k+8)=10
8k+16=10 (she said 2k instead of 8k)

To continue solving, subtract 16 from both sides. That would give you 8k= -6. Then divide both sides by 8, and get -6/8 which equals -3/4.
3 0
4 years ago
Read 2 more answers
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